Which of the following is a benefit of regular use of sunscreen?

Regular use of sunscreen is crucial for preventing premature skin aging due to its ability to block harmful ultraviolet (UV) rays from the sun. These UV rays can lead to various skin issues, including wrinkles, fine lines, and loss of skin elasticity, contributing to an aged appearance. By using sunscreen consistently, you create a protective barrier that helps maintain skin health, thereby reducing the risk of these visible signs of aging over time.

The other options do not accurately reflect the main benefits of sunscreen. While some sun protection can help with the healing process of already damaged skin, sunscreen itself does not heal existing damage; this typically requires other treatments. Increasing skin oil production is not a benefit of sunscreen; in fact, many formulations are designed to be non-comedogenic (not clogging pores) and may not affect oil production at all. Likewise, while certain products may help brighten skin tone through specific ingredients, sunscreen is primarily focused on protection rather than instant cosmetic effects.